Question about Sanyo AVM-3259S TV

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When i try to turn on my tv it just buzzes and wont turn on

It sound to me like there might be an electrical short somewhere in teh system?

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Re: when i try to turn on my tv it just buzzes and wont turn on - Sanyo AVM-3259S TV Standard (CRT) Televisions

Service required.power /horizontal sections.

Posted on Aug 30, 2007

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My magnavox tv is making a buzzing sound, no picture, and wont change channels (just a dark screen)

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It sounds like the horizontal output transistor may be shorted....Can you feel any static charge on the face of the pix tube?

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I think you have a bad flyback transformer and shorted horizontal output transistor. The flyback (high voltage) transformer shorted and caused the transistor to short. You need to get a tech to check it for you and get an estimate. The noise you hear is the power supply singing telling you that it has a short on it's load. Stargazer

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It sounds like you have a problem in the power supply or a short somewhere in the unit which is causing the power supply to stay in the standby mode to protect it. You say that it won't start with the remote, and I know this is simple, but it certainly would not hurt to try the controls on the unit, just in case the remote or pickup has a problem. If that doesn't work and you have repair skills, know how to use a DMM and check transistors, as well as knowledge of TV safety issues, you will have to troubleshoot the unit. This could be a shorted horizontal output transistor, a bad power supply or a short somewhere else in the unit. If the HOT checks bad I would replace the transistor and flyback and check all the associated components for any problems. If you find the HOT bad, that is probably your problem. If the HOT checks good, you may be beyond your skills and need to have the unit looked at by a qualified tech. That's your call. Good luck.

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1 Answer

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Sounds like the Horizontal Output Transistor shorted. TVs are dangerous to work on if you are not trained. The transistor can be checked easily with a dmm. If it is bad the flyback should probably be replaced too. If it is ok, you have a short somewhere else and need to isolate systems until the fuses quit blowing or hook it up to a variac and do checking to see where the short is. My bet is on the HOT. Again, if you are not qualified have a professional look at it. Good luck.

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